support kubectl karmada plugin

Signed-off-by: changzhen <changzhen5@huawei.com>

.gitignore

@@ -23,3 +23,4 @@ karmada-controller-manager
 karmada-scheduler
 karmada-webhook
 karmadactl
+kubectl-karmada

Makefile

@@ -38,7 +38,7 @@ ifeq ($(VERSION), "")
     endif
 endif
 
-all: karmada-controller-manager karmada-scheduler karmadactl karmada-webhook karmada-agent
+all: karmada-controller-manager karmada-scheduler karmadactl kubectl-karmada karmada-webhook karmada-agent
 
 karmada-controller-manager: $(SOURCES)
 	CGO_ENABLED=0 GOOS=$(GOOS) go build \
@@ -58,6 +58,12 @@ karmadactl: $(SOURCES)
 		-o karmadactl \
 		cmd/karmadactl/karmadactl.go
 
+kubectl-karmada: $(SOURCES)
+	CGO_ENABLED=0 GOOS=$(GOOS) go build \
+		-ldflags $(LDFLAGS) \
+		-o kubectl-karmada \
+		cmd/kubectl-karmada/kubectl-karmada.go
+
 karmada-webhook: $(SOURCES)
 	CGO_ENABLED=0 GOOS=$(GOOS) go build \
 		-ldflags $(LDFLAGS) \
@@ -71,7 +77,7 @@ karmada-agent: $(SOURCES)
 		cmd/agent/main.go
 
 clean:
-	rm -rf karmada-controller-manager karmada-scheduler karmadactl karmada-webhook karmada-agent
+	rm -rf karmada-controller-manager karmada-scheduler karmadactl kubectl-karmada karmada-webhook karmada-agent
 
 .PHONY: update
 update:

cmd/kubectl-karmada/kubectl-karmada.go

@@ -0,0 +1,20 @@
+package main
+
+import (
+	"fmt"
+	"os"
+
+	"k8s.io/component-base/logs"
+
+	"github.com/karmada-io/karmada/pkg/karmadactl"
+)
+
+func main() {
+	logs.InitLogs()
+	defer logs.FlushLogs()
+
+	if err := karmadactl.NewKubectlKarmadaCommand(os.Stdout).Execute(); err != nil {
+		fmt.Fprintf(os.Stderr, "%v\n", err)
+		os.Exit(1)
+	}
+}

pkg/karmadactl/karmadactl.go

@@ -36,7 +36,40 @@ func NewKarmadaCtlCommand(out io.Writer) *cobra.Command {
 	karmadaConfig := NewKarmadaConfig(clientcmd.NewDefaultPathOptions())
 	rootCmd.AddCommand(NewCmdJoin(out, karmadaConfig))
 	rootCmd.AddCommand(NewCmdUnjoin(out, karmadaConfig))
-	rootCmd.AddCommand(NewCmdVersion(out))
+	rootCmd.AddCommand(NewCmdVersion(out, "karmadactl version"))
+	rootCmd.AddCommand(NewCmdCordon(out, karmadaConfig))
+	rootCmd.AddCommand(NewCmdUncordon(out, karmadaConfig))
+
+	return rootCmd
+}
+
+// NewKubectlKarmadaCommand creates the `kubectl karmada` command.
+func NewKubectlKarmadaCommand(out io.Writer) *cobra.Command {
+	// Parent command to which all sub-commands are added.
+	rootCmd := &cobra.Command{
+		Use:   "karmada",
+		Short: "kubectl karmada controls a Kubernetes Cluster Federation.",
+		Long:  "kubectl karmada controls a Kubernetes Cluster Federation.",
+
+		RunE: runHelp,
+	}
+
+	// Add the command line flags from other dependencies (e.g., klog), but do not
+	// warn if they contain underscores.
+	pflag.CommandLine.SetNormalizeFunc(apiserverflag.WordSepNormalizeFunc)
+	pflag.CommandLine.AddGoFlagSet(flag.CommandLine)
+	rootCmd.PersistentFlags().AddFlagSet(pflag.CommandLine)
+
+	// From this point and forward we get warnings on flags that contain "_" separators
+	rootCmd.SetGlobalNormalizationFunc(apiserverflag.WarnWordSepNormalizeFunc)
+
+	// Prevent klog errors about logging before parsing.
+	_ = flag.CommandLine.Parse(nil)
+
+	karmadaConfig := NewKarmadaConfig(clientcmd.NewDefaultPathOptions())
+	rootCmd.AddCommand(NewCmdJoin(out, karmadaConfig))
+	rootCmd.AddCommand(NewCmdUnjoin(out, karmadaConfig))
+	rootCmd.AddCommand(NewCmdVersion(out, "kubectl karmada version"))
 	rootCmd.AddCommand(NewCmdCordon(out, karmadaConfig))
 	rootCmd.AddCommand(NewCmdUncordon(out, karmadaConfig))
 

pkg/karmadactl/version.go

@@ -17,14 +17,14 @@ var (
 )
 
 // NewCmdVersion prints out the release version info for this command binary.
-func NewCmdVersion(out io.Writer) *cobra.Command {
+func NewCmdVersion(out io.Writer, cmdStr string) *cobra.Command {
 	cmd := &cobra.Command{
 		Use:     "version",
 		Short:   "Print the version info",
 		Long:    versionLong,
 		Example: versionExample,
 		Run: func(cmd *cobra.Command, args []string) {
-			fmt.Fprintf(out, "karmadactl version: %s\n", fmt.Sprintf("%#v", version.Get()))
+			fmt.Fprintf(out, "%s: %s\n", cmdStr, fmt.Sprintf("%#v", version.Get()))
 		},
 	}